save project

snake.py

@@ -64,6 +64,8 @@ while True:
         score += 1
         score += 1
     else:        
     else:        
         position.pop(0)
         position.pop(0)
+    if x == -30 or x == 690 or y == -30 or y == 510:
+        exit()    
     position.append((x,y))    
     position.append((x,y))    
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))